You can try www.bvehk.net (under the BVE section). For TW routes
there used to exist and it have some quality route including one
that actually has an elevated station (remember clearly cause my
previous computer would always lag at the tunnel mouth before the
station) but it seems to disappear.
As for what I play, mostly the KCR West Rail (BVE4 loves
the ATO but hate driving in manual cause being restricted),
Northern Line (OpenBVE), Network West Midlands (OpenBVE), Jubilee
Line (BVE4). Have intention to upgrade the Chesam Shuttle to BVE4
standard for personal usage.
How did you download the HK routes for BVE2 ? (I tried but can't
play)